Up to 10cm (4in) is possible in Wales with the south-eastern counties again the most likely to see heavy localised falls.

Airport cancellations

Traffic Wales has warned of hazardous driving conditions on the A470 between the M4 at junction 32, the Coryton interchange at Cardiff, and Merthyr Tydfil.

In Northern Ireland - where the Met Office has issued a warning for icy roads - 5cm-10cm of snow has fallen since Monday, with the bulk of it lying over counties Antrim and Down.

Heathrow Airport cancelled dozens of flights on Tuesday and warned passengers to expect further cancellations and delays.

The snow did not deter the dogs of the Lauderdale Hunt, Lauder, Scotland

A Heathrow spokesman said: "Because Heathrow runs at almost 100% capacity, there is no slack in the system and flights unfortunately have to be cancelled. Further cancellations are inevitable given the adverse weather conditions at other airports around Europe."

There were also delays at airports including Gatwick, Birmingham, Stansted and Luton.

Eurostar warned passengers to expect delays of up to an hour because of speed restrictions imposed as a result of snow and ice while some services to Paris and Brussels on Tuesday have been cancelled.

Other rail operators including Gatwick Express, Southern and Southeastern also reported cancellations and revised timetables.

National Rail said all UK train companies were expected to run a full service on Wednesday.